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Assignment Earth: Fossil Creek reborn

Video: The undamming of a river in Arizona creates a verdant oasis and a flood of visitors creating new problems.

The undamming of a river in Arizona creates a verdant oasis and a flood of visitors creating new problems. (Video: Assignment Earth)

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"Assignment Earth" features compelling video reports from the front lines of major environmental stories from around the globe. Topics include global warming, pollution, habitat destruction and endangered species.